Ireland's R&D tax credit supports companies that carry out qualifying research and development in the State. The credit sits alongside corporation tax and is designed to lower the after-tax cost of genuine experimental development and research.
Qualifying activities generally follow a science-or-technology advancement test with systematic investigation, aligned with OECD Frascati concepts as applied under Irish legislation and Revenue guidance.
Cash treatment and surrender options have evolved; claimants should confirm the current credit rate, payable credit mechanics, and interaction with other reliefs with Revenue or a qualified Irish adviser.
Who qualifies
- Companies within the charge to Irish corporation tax that incur qualifying R&D expenditure.
- Eligibility is activity-based: software, manufacturing, life sciences, and engineering are common profiles.
- Group and subcontracting rules can affect which entity claims which costs; confirm with Irish guidance.
Eligible activities
- Systematic work to achieve a scientific or technological advancement by resolving uncertainty.
- Qualifying categories of expenditure as defined in legislation (commonly staff, certain materials, and qualifying plant in defined circumstances).
- Supporting activities directly contributing to the qualifying R&D project, where the statute allows.
Typically not eligible
- Routine product development without scientific or technological uncertainty.
- Market research, sales, and cosmetic changes.
- Activities that fail the Irish statutory definition even if labelled innovation internally.
How a claim works
- 1
Map projects to the Irish test
Document the advancement sought and the uncertainty a competent professional could not readily resolve.
- 2
Segregate qualifying costs
Apply Irish rules on staff, materials, plant, and subcontracting to build the expenditure base.
- 3
Keep contemporaneous evidence
Retain dated technical records, time allocation, and experiment logs created as work proceeds.
- 4
File with the corporation tax return
Submit the claim through the required Revenue route within applicable time limits.
- 5
Prepare for Revenue queries
Be ready to substantiate eligibility and costs if Revenue reviews the claim.
What to document
- Project narratives describing advancement, uncertainty, and systematic investigation.
- Time records and payroll support for claimed staff costs.
- Technical artefacts: designs, test results, version history, lab notes.
- Invoices and contracts for materials, plant, and subcontractors claimed.
Common pitfalls
- Describing commercial success instead of scientific or technological advancement.
- Weak contemporaneous records reconstructed only at filing time.
- Misapplying subcontracting or group cost rules.
- Missing filing or amendment windows.
Questions to ask an advisor
- “How do you document the Irish advancement and uncertainty tests for software and process R&D?”
- “What is your approach to payable credit or cash timing options under current law?”
- “Who authors the technical narrative, and how do you defend Revenue queries?”
- “How do you handle subcontracting and related-party costs?”
Frequently asked
Is Ireland's R&D credit refundable?
Ireland has mechanisms that can improve cash timing for eligible claimants, but the exact payable treatment depends on current law and the company's position. Confirm with Revenue or an Irish adviser.
Does Frascati matter in Ireland?
Irish R&D relief is commonly interpreted with reference to OECD Frascati concepts of research and experimental development, applied through Irish statute and Revenue guidance.
Is this tax advice?
No. This explainer is educational. Confirm eligibility, rates, and filing steps with official guidance and a qualified adviser.